A Recent Survey of 54,000 Randomly Selected U

question 11

Multiple Choice

A recent survey of 54,000 randomly selected U.S. adults studied the religious affiliation of Americans. The survey interviewed 645 people in Oregon. Suppose that this is a simple random sample of adult residents of Oregon. Of these 645 people, 116 said they claimed no religious identity. A 95 percent confidence interval for the proportion of all residents of Oregon who claim no religious identity is closest to:

• A) 0.16 to 0.20.
• B) 0.15 to 0.21.
• C) 0.14 to 0.22.
• D) 0.13 to 0.23.

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Definitions:

Articular Cartilage

Hyaline cartilage covering the ends of bones within a synovial joint.

Lubricating Film

A thin layer of liquid or semi-liquid substance applied to surfaces to reduce friction and wear.

Double Layer

A double layer often refers to structures composed of two levels of material, which in biological contexts, could imply the phospholipid bilayer of cell membranes or protective coatings.

Joint Surface

The part of a bone that articulates with another bone, usually covered with cartilage to enable smooth movements.